Obesity remains a serious health problem and it is no secret that many people want to lose weight. Behavioral economists typically argue that “nudges” help individuals with various decisionmaking flaws to live longer, healthier, and better lives. In an article in the new issue of Regulation, Michael L. Marlow discusses how nudging by government differs from nudging by markets, and explains why market nudging is the more promising avenue for helping citizens to lose weight.

Armed with a computer model in 1935, one could probably have written the exact same story on California drought as appears today in the Washington Post some 80 years ago, prompted by the very similar outlier temperatures of 1934 and 2014.

Two long wars, chronic deficits, the financial crisis, the costly drug war, the growth of executive power under Presidents Bush and Obama, and the revelations about NSA abuses, have given rise to a growing libertarian movement in our country – with a greater focus on individual liberty and less government power. David Boaz’s newly released The Libertarian Mind is a comprehensive guide to the history, philosophy, and growth of the libertarian movement, with incisive analyses of today’s most pressing issues and policies.

A grocery chain with nine stores in the area had hired Saint Consulting Group to secretly run the antidevelopment campaign. Saint is a specialist at fighting proposed Wal-Marts, and it uses tactics it describes as “black arts.” As Wal-Mart Stores Inc. has grown into the largest grocery seller in the U.S., similar battles have played out in hundreds of towns like Mundelein. Local activists and union groups have been the public face of much of the resistance. But in scores of cases, large supermarket chains including Supervalu Inc., Safeway Inc. and Ahold NV have retained Saint Consulting to block Wal-Mart, according to hundreds of pages of Saint documents reviewed by The Wall Street Journal and interviews with former employees. …Supermarkets that have funded campaigns to stop Wal-Mart are concerned about having to match the retailing giant’s low prices lest they lose market share. …In many cases, the pitched battles have more than doubled the amount of time it takes Wal-Mart to open a store, says a person close to the company. … For the typical anti-Wal-Mart assignment, a Saint manager will drop into town using an assumed name to create or take control of local opposition, according to former Saint employees. They flood local politicians with calls, using multiple phones to make it appear that the calls are coming from different people, the former employees say. …Former Saint workers say the union sometimes pays a portion of Saint’s fees. “The work we’ve funded Saint to do to preserve our market share and our jobs is within our First Amendment rights,” says Jill Cashen, spokeswoman for the United Food and Commercial Workers Union. Safeway declined to comment. …Mr. Saint says there is nothing illegal about a company trying to derail a competitor’s project. Companies have legal protection under the First Amendment for using a government or legal process to thwart competition, even if they do so secretly, he says.